This is the first post in a series that looks at the modelling of User Interface (UI) related software using UML.

The main purpose of the post is to explore how we effectively model the navigation of a tree-like hierarchy, especially when considering the premise “In a tree structure there is one and only one path from any point to any other point”.

The tl;dr is that UML does not necessarily have the ability to represent UI concepts of hierarchy and navigation effectively.